A.MAYDAY sent by radiotelephone
B.Continuous sounding of fog horn
C.Green star shells fired from a launcher
D.Square flag and ball in a vertical line
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A.abandon ship
B.assist in taking whatever action is necessary to avoid collision
C.hold course and speed
D.sound a distress signal
最新试题
On every vessel，distress signals must be stowed（）.
What is NOT a distress signal?（）
An orange flag showing a black circle and square is a（）.
If you log a distress message，it must include the（）.
If an airplane circles a vessel 3 times，crosses the vessel’s course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate?（）
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
If you hear the firing of a gun at one minute intervals from another vessel，this indicates that（）.
AS SOON AS I HAVE FURTHER INFORMATION I WILL MAKE ANOTHER ANNOUNCEMENT. I ASK YOU KINDLY TO REMAIN CALM. THERE IS NO DANGER AT THIS TIME. These words are likely from（）.
The service life of distress signals must be not more than（）.
Acknowledgement by you of receipt of a distress message from a vessel which，beyond any possible doubt，is not in your vicinity and is a long distance away must be made when（）.